CONTENTS. 



A. Statement of the problem I 



B. Method of investigation I 



C. Evaluation of the data 2 



D. Ontogenetic development of the skin color of the negro 4 



E. Results; 



I. The skin color of Caucasians in Bermuda and Jamaica 8 



II. Quantitative determination of the skin color of pure-bred negroes 8 



III. Skin color of the children of a negro and a Caucasian (the Fi generation).. 10 



IV. Skin color of the children of two mulattoes (the Fj generation) n 



V. Hypothesis la 



VI. Test of the hypothesis 15 



VII. Is there a sex-linkagd or sex-dimorphism in skin color? 24 



VIII. Do the children "take after" the mother and father equally? 25 



IX. Selection of mates — "grading up" to white 25 



X. The agreement of the hypothesis with popular observation and nomencla- 

 ture 27 



XI. The yellow element in the skin color J8 



XII. The "fixed white," the "pass for white," and the "white by law" 28 



XIII. Reversion to black skin color 29 



F. Discussion of inheritance of traits associated with skin color: 



I. Eye color 32 



II. Hair color 35 



III. Hair form 39 



O. Correlation of characturiiitics in hybrids 44 



I. Correlation between the color of the skin and of the hair in the Pi gen- 

 eration 44 



II. Correlation between color of the skin and form of the hair in the Fi gen- 

 eration 45 



H. Fecundity of hybrids 46 



h Summary of conclusions 46 



K. Literature cited 



47 



Appendix A; 



I. Bcrmudian f.-imilics 49 



II. Jamaican families jt 



III. Louisianian families loa 



Appendix B. Social data concerning miscegenation 105 



